I’m currently taking latin 3 online, and I hate it so much that I decided to drop it. Would highly selective colleges care if I took only 2 years of foreign language? Since I’m more fluent at korean, would taking a korean subject test and getting a near or perfect score on it cover my weakness in taking only two foreign Lang in high school?
Not if you/your parents are Korean. Colleges expect you to study a foreign language in a class (or online) during your HS years. Now if you did some type of Saturday Korean school, you might have a case.
Well, if a highly selective college requires/requests 3/4 years, then yes, they will care.